Kickdown fine tune adjustment

Do you know the year of the 904 ? I believe that 71 was the first year for part throttle kick down.
I may be wrong so don't hold me to it. Before that kick down was only under full throttle.
It sounds like you question is, say you are rolling at 20 mph and the transmission is in 2nd will it kick down to 1st when you press the accelerator . It is my understanding that the kick down overrides the governor pressure in the valve body
till set rpm allows the governor weight to override the kick down.